<template>
  <!-- 商品分类导航 -->
  <div class="type-nav">
    <div class="container">
      <div @mouseleave="handlLeave">
        <h2 class="all" @mouseenter="changeisshwo">全部商品分类</h2>
        <!-- 过度的标签 -->
        <transition name="sort">
          <div class="sort" v-show="isshow">
            <div class="all-sort-list2" @click="goSearch">
              <!-- 一级分类 -->
              <div class="item bo" v-for="(c1, index) in list" :key="c1.categoryId">
                <h3 :class="{ active: activeIndex === index }" @mouseenter="handlenter(index)">
                  <a href="javascript:;"  :data-categoryName="c1.categoryName" :data-category1Id="c1.categoryId">
                    {{ c1.categoryName }}
                  </a>

                </h3>
                <!-- 某一个一级分类右侧二级 -->
                <div class="item-list clearfix" v-show="activeIndex === index">
                  <div class="subitem">
                    <dl class="fore" v-for="c2 in c1.categoryChild" :key="c2.categoryId">
                      <dt>
                        <a  href="javascript:;" :data-categoryName="c2.categoryName" :data-category2Id="c2.categoryId">
                          {{ c2.categoryName }}
                        </a>
                      </dt>
                      <dd>
                        <!-- 三级分类 -->
                        <em v-for="c3 in c2.categoryChild" :key="c3.categoryId">
                          <a  href="javascript:;" :data-categoryName="c3.categoryName" :data-category3Id="c3.categoryId">{{
                            c3.categoryName }}</a>
                          <!-- <router-link
                          :to="`search?categoryName=${c3.categoryName}/category1Id=${c3.categoryId}`">{{ c3.categoryName }}
                        </router-link> -->
                        </em>
                      </dd>
                    </dl>
                  </div>
                </div>
              </div>
            </div>
          </div>
        </transition>

      </div>
      <nav class="nav">
        <a href="javascript:;">服装城</a>
        <a href="###">美妆馆</a>
        <a href="###">尚品汇超市</a>
        <a href="###">全球购</a>
        <a href="###">闪购</a>
        <a href="###">团购</a>
        <a href="###">有趣</a>
        <a href="###">秒杀</a>
      </nav>
    </div>
  </div>
</template>

<script>
import { mapState } from 'vuex';
export default {
  name: 'TypeNav',
  // 数据
  data() {
    return {
      activeIndex: -666,
      //定义一个响应式的数据:控制分类的显示与隐藏
      //如果home->为真
      //如果不是首页->真假切换
      isshow: true,
    };
  },
  // 方法
  methods: {
    // 鼠标移入的回调(移入展示高亮)
    handlenter(index) {
      this.activeIndex = index;
    },
    // 鼠标移除的回调
    handlLeave() {
      this.activeIndex = -666;
      // 鼠标离开红色区域(搜索或者详情页面) 隐藏菜单栏
      if (this.$route.path !== '/home') {
        this.isshow = false;
      }
    },
    // 路由跳转带参数(利用了事件委派)
    goSearch(event) {
      console.log(event.target.dataset);
      let { categoryname, category1id, category2id, category3id } =
        event.target.dataset;

      if (categoryname) {
        const Address = {
          name: 'search',
          query: { categoryName: categoryname },
        };

        if (category1id) {
          Address.query.category1Id = category1id;
        } else if (category2id) {
          Address.query.category2Id = category2id;
        } else {
          Address.query.category3Id = category3id;
        }
        //如果点击分类的时候:已有params参数需要携带
        if (this.$route.params.keyword) {
          locations.params = this.$route.params;
        }
        this.$router.push(Address);
      }
    },
    //
    changeisshwo() {
      //鼠标进入红色区域(搜索|详情页),商品分类显示
      if (this.$route.path !== '/home') {
        this.isshow = true;
      }
    },
  },
  // 挂在完毕的钩子
  mounted() {
    // 通知vuex发起请求
    this.$store.dispatch('getList');
    // console.log(this.$store);

    // 判断路由路径不等于/home 全部都隐藏分类
    if (this.$route.path !== '/home') {
      this.isshow = false;
    }
  },
  // 辅助函数获取仓库数据
  computed: {
    ...mapState({
      list: (state) => {
        // 返回请求回来的数据
        return state.Home.reqHeaderList;
      },
    }),
  },
};
</script>

<style scoped lang="less">
.type-nav {
  border-bottom: 2px solid #e1251b;

  .container {
    width: 1200px;
    margin: 0 auto;
    display: flex;
    position: relative;

    .all {
      width: 210px;
      height: 45px;
      background-color: #e1251b;
      line-height: 45px;
      text-align: center;
      color: #fff;
      font-size: 14px;
      font-weight: bold;
    }

    .nav {
      a {
        height: 45px;
        margin: 0 22px;
        line-height: 45px;
        font-size: 16px;
        color: #333;
      }
    }

    .sort {
      position: absolute;
      left: 0;
      top: 45px;
      width: 210px;
      // height: 461px;
      position: absolute;
      background: #dde;
      z-index: 999;

      .all-sort-list2 {
        .item {
          h3 {
            line-height: 30px;
            font-size: 14px;
            font-weight: 400;
            overflow: hidden;
            padding: 0 20px;
            margin: 0;

            a {
              color: #333;
            }
          }

          .active {
            background-color: yellowgreen;
          }

          // h3:hover {
          //   background-color: yellowgreen;
          // }

          .item-list {
            // display: none;
            position: absolute;
            width: 734px;
            min-height: 460px;
            background: #f7f7f7;
            left: 210px;
            border: 1px solid #ddd;
            top: 0;
            z-index: 9999 !important;

            .subitem {
              float: left;
              width: 650px;
              padding: 0 4px 0 8px;

              dl {
                border-top: 1px solid #eee;
                padding: 6px 0;
                overflow: hidden;
                zoom: 1;

                &.fore {
                  border-top: 0;
                }

                dt {
                  float: left;
                  width: 54px;
                  line-height: 22px;
                  text-align: right;
                  padding: 3px 6px 0 0;
                  font-weight: 700;
                }

                dd {
                  float: left;
                  width: 415px;
                  padding: 3px 0 0;
                  overflow: hidden;

                  em {
                    float: left;
                    height: 14px;
                    line-height: 14px;
                    padding: 0 8px;
                    margin-top: 5px;
                    border-left: 1px solid #ccc;
                  }
                }
              }
            }
          }

          &:hover {
            .item-list {
              display: block;
            }
          }
        }
      }
    }
  }

  .active {
    background-color: #e1251b;
  }

  /**
    过度动画的样式
  **/
  .sort-enter {
    opacity: 0;
    height: 0;
  }

  .sort-enter-active {
    transition: all 0.8s; //过度时间
  }

  .sort-enter-to {
    opacity: 1;
    height: 461px;
  }
}
</style>
